Work-illuminating device



Jan. I4, 1930. M. H. EDMoNDsoN WORK ILLUMINATING DEVICE Filed Nov. 22,1928 2 Sheets-Sheet 1 ATTORNEY 1930. M. H. EDMONDSON v WORKILLUMINATING' DEVICE Filed Nov. 22, 1928 2 Sheets-Sheet Jan. 14,

lllllllllllllllllllllllllllll\|\l\ll nl INVENToR /l/Xf/vo/rasof/ BY i SgATroRNEY Patented Jan. 14, 193()` UNITED STATES MORTON H. EDMONDSON, OFGREENVILLE, TEXAS WORK-ILLUMINATING :DEVICE Application filed November22, 1928.

This invention relates to'new and useful iinprovements in workilluminating devices.

One object of the invention is to provide an illuminating devicearranged to be so mounted on rotating excavators, cranes and the like,as to remain stationary whilethe machine is rotating and thus maintainconstant illumination on the work.

A further object of the invention is to provide a stationary lightforlrotating machines which may be adjusted vertically.

A particular object of the invention is to provide a lamp supportmounted in a rotatable body and connected with a compensating gearingsoas to hold said support and its lamp to a given position and thus directthe light rays upon a fixed location irrespective of the rotation of thebody. A construction designed to carry: out' the invention will behereinafter described, together with other features of the invention.

The invention will be more readily understood from a reading ofthefollowing speciiication and by reference to the accompanyingdrawings, in which an example of the invention is shown, and wherein:

Fig. 1 is a view of an excavating machine, partly in elevation andpartly in f section, equipped with an illuminating device constructed inaccordance with the invention,

Fig. 2 is an enlarged cross-sectional view taken on the line 2 2 of Fig.1 and looking in the direction of the arrows,

mast,

3 is a detail of the adjustable lampV Serial No. 321,125.

Fig. 8 is a horizontal cross-sectional view taken on the line 8 8 ofFig. 7, and

Fig. 9 is a detail ofthe clutch.

In the drawings the numeral 10 designates the truck and 11 the cab of anexcavating ma 50 chine, crane or similar machine to which the inventionis adapted. The truck has a turntable 13 and the cab is connectedthereto by a central pivot post 14.

In the floor of the cab is mounted a Hoor iiange 15 and an uprighttubular shaft or post 16 is journaled in the flange.- The post eX- tendgthrough a flanged bearing 17 in the roof of the cab. An extension tube18 telescopes into the upper end of the post and is fastened by a setJscrew 19, thus making' for vertical adjustment. The post and tubeconstitute a mast.

A clamp 2O is adj ustably mounted on the upper end of the vtube so as tobe rotated j around the tube or moved vertically thereon and fastened inposition.` A lamp socket 21 is pivoted to the clamp so as to be swung ina vertical arc and fastened to direct the light rays on the desiredlocation. A reflector shade 22 is mountedr on the socket.

The post 16 may be made in one piece or it may be split and connected bya clutch as is shown in Figs. 5 and 9. The lower section of the splitpost is fastened inthe bottom ofa flanged socket 23 which receives aclutch sleeve -24 surrounding the lower end ofthe upper post section. vj

The sleeve has a key-way 26 receiving a key 25 on the upper postsection. The socket and sleeve are flanged.` the latter having teeth 27engaging in sumps 28in the former, whereby rotation is contributed fromthe lower post'section through its socket which in turn rotates theupper post section vthrough the agency of the keyed sleeve. Y

For supplying electrical current to the lamp of the socket 22, a cable29 extends through the tube 18 Vand at a point below saidtube isconnected to insulated commutator rings 30 on the post having suitableelectric Circuit connections 31 which permit rotation of the post. Thepost 16 is located eccentrically of the pivot 14 of the cab and truck.YIt is desirable to have the post remain relatively stationary when the.cab is rotated soi as to keep the rays of light directed 011 a fixedlocation. p There are several ways of accomplishing this result, some ofwhich will be described herein. f

In Figs. 1 and 2 the post'16 is extended below the floor of the cab l1and has a pulley 32 fastened thereon. A beltV 33 passing Y around thispulley Valso passes'around a pulley 34 fastened to the pivot post 14which is stationary in the truck 16, thus when the cab 11 is rotated thebelt will cause the post 16 to retain its relative positionV withreference to the stationary truck, whereby the lamp will remainstationary. Y

In Fig. 4 a similar result is obtained by Yfastening a gearr35 `on thelower end of the post 16. This gear meshes with a pinion 36 suitablyjournaled to the floor of the cab and in turn meshing with a gear 37Vfastened to the stationary pivot post 14. When the cab is swung in thedirection of the arrow (Fig. 4)

the gear 35 and pinion 36 will be' swung in the directions of the arrowsowing to the connection with the fixed gear 37. The term gearing is usedherein to designate gears,

Y pinions, -belts and chains and sprockets.

In Figs. 5 and Gthe turn table 13 is provided the same as in Figs. 1 and2. A shaft 4() mounted in a bracket 38 on the side of the cab is drivenby a beveled gear 39 from a beveled pinion 39 suitably driven from thecab andthe latter thus rotated.V A counter shaft 41 is mounted in abracket 42 on'the side of the cab and has a pulley 43 fastened thereon.This pulley 43 is driven by a belt 44 from a pulley 45 on the shaft 40.A second pulley 46 onthe shaft 41 drives a belt 47 which in turn drivesa pulley 48 fastened on the lower end of the post 16. The arrowsindicate the directions ofI rotation of ythe elements.

Figs. 7 and 8 show ,still another driving arrangement. VThe cab mayberotated as is Vshown in Figs. 5 and 6 or by any other means 2 50 gagesthe ringgear and is fastened on a shaft involving a ring gea'rf13..A ApinionV 49 en- 570 journaled inajbracketl secured to one side of the cabat the bottom thereof. 'o v Apulley 52 fastened on the shaft 5() drivesa belt 5.3 which in turn drivesfa large pulley .54,joumaled under thefloor of the cab. The

pulley 54 is connected With'and rotates a small pulley 55 which in turndrives a belt 56. VThe beltdrives a larger pulley 57 fastened on the llower end of the post 16. The arrows' in dicate the directions ofrotation.' In each train of gearing inthe several figures the rotatingelementsare of auchr diameters aste give the Vdesired result inretaining the postin itsA rela- Y tire position. By lifting thesleeve`24v of theA clutch the post 16 may be rotatably adjusted to focusthe light on the desired location.

Various changes in the size and shape of Y' `upper end and rotatablymounted on the cab, and means connected with the relatively stationarytruck for holding the illuminating member so as to direct the rays ofits lighting means on a fixed location while the cab is being rotated. f

2. In a work illuminating device, the combination witha portable truckand a cab rotatably mounted on the truck, of an illuminating memberhaving'lighting means at its upper end and rotatably mounted on the cab,

means connected withk the relativelyV stationary truckfor holding theilluminating memf ber so as 'to direct therays-of its 'lighting means ona fixed location while the Vcab is being rotated, and means foradjusting the illuminating member to direct its light rays on differentlocations. Y

3. In a work illuminating device, the com-n bination with a portableltruck and a cab rotatably mountedon thetruck, of an upright postrotatably mounted in the cab, illuminatingfmeans mounted on the upperend 'of the post above the cab, and means connected with the rotatablepost for compensating the'rotation of the cabwhereby the illuminatingVmeans is held in a relativelyk fixed position withY relation to thework.

4. Ina work illuminating bination with a portable truck and a cabrotatably mounted on the truck, of an upright device, the com-.

post rotatably mounted in the ca'bgilluminat- .Y ing means mounted onthe upper end of the nating means may be directed ondifferent" Y `worklocations.

5. In a work illimiinating device, the-com``Y Y i bination with aportable truck and a cab ro-- tatably mounted on the truck,of anuprightpost rotatably mounted in( thev cab, an extenf sion verticallyadjustableon the upperend of I the post above the cab,ra lamp socket adjustablymounted onr` the' extension, a rotating' element on the lower portion ofthe post, and adriving connection connected with said rotating element.y j Y 'f j l 6. In a work illuminating device, `the combination witha.portable1truck and a, cab-ro tata'bly mounted on the truck, of anupright post rotatably mounted in the eab, an extension verticallyadjustable on the upper end of the post above the cab, a lamp socketadjustably mounted on the extension, a. rotating element on the lowerportion of the post, a driving connection Connected with said rotatingelement, and a clutch connected in the post whereby the upper portion ofthe post may be rotatably adjusted with relation to the lower portion ofthe post.

In testimony whereof I afliX my signature.

MORTON H. EDMONDSON.

